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...LOCALLY DENSE FOG WILL CONTINUE THROUGH SUNSET...THOSE OF YOU TRAVELING THROUGH THE QUAD STATE REGION WILL CONTINUETO EXPERIENCE RAPID CHANGES IN VISIBILITY DUE TO FOG FOR THE RESTOF THIS AFTERNOON.WARM AND BREEZY SOUTHERLY WINDS ARE BRINGING ABOVE NORMALTEMPERATURES TO THE REGION THIS AFTERNOON. THIS WARM AIR IS MOVINGOVER COLD AIR JUST ABOVE THE GROUND. THIS IS CAUSING THE AIR NEARTHE SURFACE TO BECOME QUITE SATURATED...LEADING TO THE DEVELOPMENTOF FOG.THIS FOG WILL BE LOCALLY DENSE AT TIMES AND MAY VARY RAPIDLY FROMONE LOCATION TO ANOTHER.BE PREPARED FOR RAPID CHANGES IN VISIBILITY WHILE YOU ARE DRIVINGON ROADWAYS. MAKE SURE THAT YOU KEEP YOUR HEADLIGHTS ON...SIGNALYOUR INTENTIONS WELL AHEAD OF TIME...AND LEAVE ENOUGH ROOM BETWEENYOURSELF AND OTHER DRIVERS ON THE ROAD.THIS AREA OF FOG WILL GRADUALLY MOVE NORTHWARD DURING THEAFTERNOON...SPREADING FROM A BLOOMFIELD MISSOURI...PADUCAH ANDHENDERSON KENTUCKY LINE AS OF 2 PM CST...NORTHWARD NEAR APERRYVILLE MISSOURI...HARRISBURG ILLINOIS EVANSVILLE INDIANA LINEBEFORE DUSK.AS RAIN CONTINUES TO OVERSPREAD THE REGION...VISIBILITIES DUE TOTHE FOG WILL IMPROVE. DRIVERS WILL THEN NEED TO BE WATCHFUL FORPONDING OF WATER ON ROADWAYS AND LOW LYING AREAS.SHOULD THE FOG BECOME MORE WIDESPREAD AND DENSE THROUGH THEAFTERNOON AND EVENING...A DENSE FOG ADVISORY MAY BE REQUIRED.